JP2019093768A - Vehicle body structure - Google Patents

Abstract

To provide a vehicle body structure in which deformation of a side frame to a vehicle width direction inner side at the time of side collision can be suppressed.SOLUTION: The vehicle body structure comprises a box member 116 which projects from a side wall of a side frame 104 on a vehicle width direction outer side to the vehicle width direction outer side, an upper wall 186 of the box member has first beads 190a, 190b which are so formed as to be separated from each other in a vehicle longitudinal direction, and a lower wall 187 of the box member has second beads 192a, 192b which are so formed as to be spaced from each other in the vehicle longitudinal direction. A reinforcement member 188 of the box member has vertical walls 194a, 194b which connect the upper wall and the lower wall, and inclined walls 198a, 198b which so extend as to be inclined between the vertical walls while approaching each other, and reach the lower wall from the upper wall. The first beads and the second beads are positioned in a range of the inclined walls in the vehicle longitudinal direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicle body structure.

  A vehicle such as a car has a vehicle body structure including a pair of side frames extending in the vehicle longitudinal direction and spaced apart in the vehicle width direction. Patent Document 1 describes a vehicle floor structure in which a corrugated member is disposed between a pair of side members (side frames) and a pair of side sills extending in the vehicle longitudinal direction along the side edges of the floor panel. It is done. The pair of side sills are spaced apart on the outer side in the vehicle width direction of the pair of side members.

  The corrugated plate-like member described in Patent Document 1 is disposed in such a manner that a ridge line formed by a peak and a valley is directed in the vehicle width direction. The peak portion of the corrugated member is welded to the lower surface of the floor panel, and is substantially horizontal in a state of being attached to the vehicle body.

  One end of the valley portion of the corrugated member is flush with the bottom of the side frame, and the other end is flush with the bottom of the side sill. The bottom of the side frame is lower than the bottom of the side sill. Furthermore, the corrugated member has a trapezoidal shape in a front view.

  In Patent Document 1, since the cross-sectional area of the corrugated member is reduced outward in the vehicle width direction, the rigidity is gradually reduced as it goes outward and is likely to be deformed, resulting in good energy absorption efficiency. It can be done. Therefore, according to the vehicle body floor structure of Patent Document 1, it is possible to absorb a large amount of energy in a short stroke with respect to the load from the side portion of the vehicle.

Patent No. 4714453

  However, the technology described in Patent Document 1 merely absorbs energy by actively deforming a corrugated plate-like member that has received a load from the vehicle side (load at the time of a side collision). If energy absorption is insufficient even if the corrugated plate member is deformed at the side collision, the side frame may be deformed inward in the vehicle width direction, and the cabin (cabin) may be deformed.

  An object of the present invention is to provide a vehicle body structure capable of suppressing deformation of a side frame inward in the vehicle width direction at the time of a side collision, in view of such a problem.

  In order to solve the above problems, a representative configuration of a vehicle body structure according to the present invention is a member extending in the vehicle longitudinal direction and having a pair of side frames disposed apart in the vehicle width direction. The structure further includes a box member disposed on an outer side wall width direction side wall of each of the pair of side frames and projecting outward from the side wall width direction, and the box member includes an upper wall, a lower wall, and an upper wall The upper wall includes a pair of first beads extending in the vehicle width direction and spaced apart in the vehicle longitudinal direction, and the lower wall extends in the vehicle width direction. The reinforcing member has a pair of vertical walls spaced apart in the vehicle longitudinal direction and connecting the upper wall and the lower wall, and a pair of longitudinal walls It inclines so as to descend while approaching each other between the walls and extends downward from the upper wall And a pair of inclined walls to reach the first bead and a pair of second bead pair is characterized by being located within the vehicle longitudinal direction of the pair of inclined walls.

  In order to solve the above problems, another typical configuration of a vehicle body structure according to the present invention is a member extending in the vehicle longitudinal direction and provided with a pair of side frames spaced apart in the vehicle width direction. The vehicle body structure further includes a box member disposed on an outer side wall width direction side wall of each of the pair of side frames and protruding outward from the side wall width, and a bulkhead reinforcing each of the pair side frames from the inside And the box member includes an upper wall, a lower wall, and a reinforcing member connecting the upper and lower walls, the reinforcing members being spaced apart in the vehicle longitudinal direction to connect the upper and lower walls The bulkhead has a pair of vertical walls and a pair of sloped walls extending obliquely downward and approaching each other between the pair of vertical walls and reaching the lower wall from the upper wall, and the bulkhead includes the pair of inclined walls Before and after the vehicle on one of the inclined walls Characterized in that it is located within the direction.

  According to the present invention, it is possible to provide a vehicle body structure capable of suppressing the deformation of the side frame inward in the vehicle width direction at the time of a side collision.

It is a figure showing roughly the cabin arranged in the body structure concerning the example of the present invention, and a body structure. It is a figure which shows the state which looked at the vehicle body structure of FIG. 1 from upper direction. It is a figure which shows a part of state which looked at the vehicle body structure of FIG. 2 from the downward direction. It is B arrow line view of the vehicle body structure of FIG. It is a figure which shows typically the AA cross section of the vehicle body structure of FIG. It is a figure which shows the CC cross section of the vehicle body structure of FIG.

  A representative configuration of a vehicle body structure according to an embodiment of the present invention is a member extending in the longitudinal direction of the vehicle and including a pair of side frames spaced apart in the vehicle width direction, wherein the vehicle body structure is further A box member disposed on an outer side wall of each of the pair of side frames and protruding outward from the side wall, the box member including an upper wall, a lower wall, an upper wall, and a lower wall; The upper wall has a pair of first beads extending in the vehicle width direction and spaced apart in the vehicle longitudinal direction, and the lower wall extends in the vehicle width direction The reinforcement member has a pair of second beads formed to be separated in the front-rear direction, and the reinforcing member is a pair of vertical walls that are separated in the vehicle front-rear direction and connect the upper wall and the lower wall, and the pair of vertical walls Extend from the upper wall to the lower wall by sloping so as to descend while approaching each other Of an inclined wall, the first bead and a pair of second bead pair is characterized by being located within the vehicle longitudinal direction of the pair of inclined walls.

  According to the above configuration, the reinforcing member of the box member has the pair of vertical walls and the pair of sloped walls inclined between the pair of vertical walls. As an example, when the pair of vertical walls and the pair of inclined walls are joined to each other by the upper wall and the pair of inclined walls are joined to the lower wall, the reinforcing member is M-shaped continuous as viewed from the side It becomes a member that As another example, the reinforcing member may further include a pair of ceiling walls and a bottom wall. In this case, a pair of top walls extend from the pair of vertical walls along the top wall so as to be close to each other to connect the pair of vertical walls and the pair of sloped walls, and the bottom wall is further lowered. You may form so that a pair of inclined walls may be connected along a wall. In this way, the reinforcing member becomes a substantially M-shaped continuous member when viewed from the side. As still another example, the reinforcing member joins the pair of vertical walls and the pair of inclined walls to the upper wall in a state of being separated from each other, and further couples the pair of inclined walls to the lower wall in a state of being separated from each other You may In such a case, the pair of vertical walls and the pair of sloped walls are not joined to each other, and the pair of sloped walls are not joined to each other. For this reason, the reinforcing member comprises four members which are not continuous, that is, a pair of vertical walls and a pair of inclined walls, and when viewed from the side, results in a substantially M shape.

  As described above, since the box member includes the upper wall, the lower wall, and the reinforcing member connecting the upper and lower walls with the pair of vertical walls and the pair of inclined walls, the box shape is formed by these. , Can increase the rigidity. Thus, the box member can maintain the box shape against the load even when the box member receives a load at the side collision.

  Further, since the pair of first beads of the upper wall is positioned within the range of the pair of sloped walls in the vehicle longitudinal direction, the rigidity of the pair of sloped walls of the upper wall can be enhanced within the range of the vehicle longitudinal direction. . Furthermore, since the pair of second beads of the lower wall is located within the range of the pair of sloped walls in the vehicle longitudinal direction, the rigidity of the pair of sloped walls of the lower wall can be enhanced within the range of the vehicle longitudinal direction. . As a result, the box member can maintain the box shape against the load even when the box member receives a load that causes the upper wall and the lower wall to approach each other and crush the side collision. Therefore, according to the above configuration, the rigidity of the box member disposed on the side wall on the outer side in the vehicle width direction of the side frame can be enhanced, and the deformation of the box member at the side collision can be suppressed.

  Another representative configuration of a vehicle body structure according to an embodiment of the present invention is a vehicle body structure including a pair of side frames extending in the vehicle longitudinal direction and spaced apart in the vehicle width direction. And a box member disposed on the side wall of the pair of side frames on the outer side in the vehicle width direction and protruding outward from the side wall, and a bulkhead reinforcing each of the pair of side frames from the inside thereof The box member includes an upper wall, a lower wall, and a reinforcing member connecting the upper wall and the lower wall, and the reinforcing members are spaced apart in the vehicle longitudinal direction to connect a pair of longitudinals connecting the upper wall and the lower wall. The bulkhead has a wall and a pair of sloped walls extending so as to descend while approaching each other between the pair of vertical walls and reaching the lower wall from the upper wall, and the bulkhead is any one of the pair of sloped walls Within the range of the longitudinal direction of the vehicle Characterized in that it is location.

  According to the above configuration, the box member includes the upper wall, the lower wall, and the reinforcing member connecting the upper wall and the lower wall with the pair of vertical walls and the pair of inclined walls, thereby forming a box shape The rigidity can be enhanced. Thus, the box member can maintain the box shape against the load even when the box member receives a load at the side collision. As described above, the reinforcing member may be an M-shaped member in which a pair of vertical walls and a pair of inclined walls are continuous when viewed from the side, and the pair of top and bottom walls Further, it may be a continuous substantially M-shaped member. Furthermore, as described above, the reinforcing member is composed of four non-continuous members, that is, a pair of vertical walls and a pair of inclined walls, and as a side view, even if it is a member forming a substantially M shape as a result. Good.

  Further, in the above configuration, the bulkhead that reinforces the side frame from the inside is located within the range of the vehicle longitudinal direction of any one of the pair of inclined walls. For this reason, the side frame serving as a back shield of the box member at the time of a side collision supports an inclined wall which is diagonally transferred between the upper wall and the lower wall of the reinforcing members around the bulkhead around the bulkhead. Can. Therefore, the side frame can sufficiently support the box member including the upper wall and the lower wall in addition to the reinforcing member in the back and forth direction. Therefore, according to the above configuration, the rigidity of the box member disposed on the side wall on the outer side in the vehicle width direction of the side frame is enhanced to suppress the deformation of the box member at the side collision, and the back shield of the box member at the side collision The deformation of the side frame itself can be suppressed, and the box member can be reliably supported.

  The upper wall has a first bead extending in the vehicle width direction, and the lower wall has a second bead extending in the vehicle width direction, and the position of the bulkhead, the first bead and the second bead in the vehicle longitudinal direction Should be equal to each other.

  Thereby, in the box member, the rigidity of the upper wall is enhanced by the first bead, and the rigidity of the lower wall is enhanced by the second bead. Further, since the positions in the vehicle longitudinal direction of the bulkhead, the first bead and the second bead are equal to each other, the side frame is made of the upper wall, the lower wall and the reinforcing member of the box member with increased rigidity. Can be supported with a focus on

  The above-described vehicle body structure further includes a cross member passed between the pair of side frames, and the position of the cross member attached to the side frame in the vehicle longitudinal direction is either of the pair of inclined walls of the box member It is good to be located in the range of the vehicles longitudinal direction of one inclination wall.

  In this manner, the vehicle longitudinal direction position of the mounting location where the cross member is attached to the side frame is positioned within the vehicle longitudinal direction range of any one of the pair of inclined walls of the box member. At the time of a collision, the cross member can serve as a back shield to support the box member. Thus, the box member can be reliably supported by the cross member in addition to the side frame at the side collision. Moreover, the side frame which becomes a back shield of a box member can suppress the deformation | transformation at the time of a side collision by being supported by a cross member.

  The above-described vehicle body structure further includes a suspension bracket disposed below each of the pair of side frames, and the suspension bracket is a range in the vehicle longitudinal direction of any one of the pair of inclined walls of the box member. It is good to be located inside.

  Here, the suspension bracket is a bracket that suspends the rear wheel, and is fixed to the side frame with high rigidity. Therefore, according to the above configuration, the side frame serving as the back shield of the box member at the side collision can be supported by the suspension bracket to suppress the deformation at the side collision. Further, by positioning the suspension bracket within the range in the vehicle longitudinal direction of one of the inclined walls of the pair of inclined walls of the box member, the box member can be reliably supported not only by the side frame but also by the suspension bracket.

  The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The dimensions, materials, other specific numerical values, and the like shown in the embodiments are merely examples for facilitating the understanding of the invention, and the invention is not limited except as otherwise described. In the specification and the drawings, elements having substantially the same functions and configurations will be denoted by the same reference numerals to omit repeated description, and elements not directly related to the present invention will not be illustrated. Do.

  FIG. 1 is a view schematically showing a vehicle body structure 100 and a cabin 102 disposed in the vehicle body structure 100 according to an embodiment of the present invention. In the drawing, the vehicle body structure 100 and the cabin 102 are viewed obliquely from below. FIG. 2 is a view of the vehicle body structure 100 of FIG. 1 as viewed from above. FIG. 3 is a view showing a part of the vehicle body structure 100 of FIG. 2 as viewed from below. FIG. 4 is a view on arrow B of the vehicle body structure 100 of FIG. FIG. 5 is a view schematically showing an AA cross section of the vehicle body structure 100 of FIG. Hereinafter, arrows X and Y shown in the respective drawings indicate the vehicle front side and the vehicle right side, respectively.

  As shown in FIG. 1, the vehicle body structure 100 includes a pair of side frames 104 and 106 spaced apart in the vehicle width direction and a plurality of cross members 108 a passed between the pair of side frames 104 and 106. And 108i. The vehicle body structure 100 forms a frame-like frame structure as shown by these members. The vehicle body structure 100 is also applicable to a type of vehicle in which the cabin 102 is disposed above the frame structure as illustrated.

  The cabin 102 includes a pair of side sills 110, 112. The pair of side sills 110 and 112 are members extending in the vehicle longitudinal direction along the side edges of the floor panel 114, and are spaced apart from the pair of side frames 104 and 106 to the outside in the vehicle width direction (see FIG. 5) .

  The vehicle body structure 100 further includes a pair of rigid box members 116 and 118. The box member 116 is disposed on the side wall 120 outside the side frame 104 in the vehicle width direction, as shown in FIG. 5. The box member 116 is located between the side wall 120 and the side sill 110 and protrudes outward in the vehicle width direction from the side wall 120. The box member 116 projects from the side wall 120 to the outside in the vehicle width direction by the dimension La, so that the gap with the side sill 110 is sufficiently close to the side sill 110 with the dimension Lb smaller than the dimension La. On the other hand, the box member 118 is disposed on the side wall 122 (see FIG. 2) in the vehicle width direction of the side frame 106, protrudes outward from the side wall 122 in the vehicle width direction, and approaches the side sill 112 shown in FIG.

  As shown in FIG. 2, the side frames 104 and 106 extend in the front-rear direction of the vehicle and have symmetrical shapes. The side frames 104 and 106 are members having a rectangular closed cross section 124 (see FIG. 5).

  Furthermore, as shown in FIG. 2, end flared portions 126, 128, parallel portions 130, 132 and inflection portions 134, 136 are formed in each of the side frames 104, 106. The end spread portions 126 and 128 are portions directed outward in the vehicle width direction toward the rear of the vehicle. The parallel portions 130 and 132 are portions located behind the diverging portions 126 and 128 and extending in parallel with each other. The inflection portions 134 and 136 are portions serving as boundaries between the end spread portions 126 and 128 and the parallel portions 130 and 132.

  That is, as shown in FIG. 2, the side frames 104 and 106 increase in the vehicle width direction toward the rear of the vehicle in the end spread portions 126 and 128, and the parallel portions 130 and 132 via the inflection portions 134 and 136 It becomes parallel state. Therefore, the inflection parts 134 and 136 of the side frames 104 and 106 are convex outward in the vehicle width direction, and when receiving a load accompanying a side collision, the repulsive force against the load to maintain its own shape It is a highly rigid part that produces Here, as a side collision, as an example, it is assumed that a pole 138 (power pole) shown by a dotted line in the figure collides from an oblique front on the outer side in the vehicle width direction at an angle R of about 75 degrees with respect to the vehicle longitudinal direction. . In the figure, the situation where the box member 116 receives an input load (see arrow D) by such a side collision is illustrated.

  The box members 116 and 118 are disposed on the side walls 120 and 122 on the outer side in the vehicle width direction of the side frames 104 and 106 so as to straddle such rigid inflection portions 134 and 136. Projected into Therefore, the box members 116 and 118 are supported by the inflection portions 134 and 136 of the side frames 104 and 106 when receiving the load at the side collision.

  As shown in FIG. 2, among the cross members 108a to 108i, the cross member 108d and the cross member 108e are located at the fourth and fifth positions from the front side of the vehicle. The cross member 108d is bent so that both end portions in the vehicle width direction are positioned forward of the center portion in the vehicle width direction, and both end portions in the vehicle width direction are respectively attached to the side frames 104 and 106 via the brackets 140a and 140b. It is joined.

  Cross member 108e is bent to a pair of side frames 104, 106 on the rear side of the vehicle than cross member 108d, so that both end portions in the vehicle width direction are positioned on the rear side of the vehicle than the center portion in the vehicle width direction. doing. Both ends in the vehicle width direction of the cross member 108e are joined to the side frames 104 and 106 via the brackets 142a and 142b, respectively. For this reason, the attachment points of the cross members 108e of the pair of side frames 104, 106 correspond to the positions of the brackets 142a, 142b.

  The brackets 142a and 142b include at least one side 144a and 144b parallel to the cross member 108e, one side 146a and 146b parallel to the side frames 104 and 106, and one side 148a and 148b intersecting the cross member 108e. Therefore, the brackets 142a and 142b have a polygonal shape (here, a triangular shape) as shown in FIG. 2, but the present invention is not limited to this. As an example, the brackets 142a and 142b may have a trapezoidal shape in parallel with any of the sides 144a and 144b or the sides 146a and 146b by bending a part of the sides 148a and 148b.

  Thus, the cross members 108 e can be attached to the side frames 104 and 106 with high rigidity by making the brackets 142 a and 142 b into a polygonal shape such as a triangular shape or a trapezoidal shape. Further, as shown in the drawing, the cross members 108d and 108e are joined at their center portions in the vehicle width direction by a joining member 150, and are formed in an X shape in plan view.

  As shown in FIG. 6, the bracket 142 a overlaps at least the front end 152 of the box member 116 as viewed from the side. The relationship between the bracket 142b and the front end portion 154 of the box member 118 is the same although it is not shown because it is symmetrical. Under each of the side frames 104 and 106 shown in FIG. 3, suspension brackets 156 and 158 are disposed. The suspension brackets 156 and 158 are brackets for suspending a rear wheel (not shown), and are fixed to the side frames 104 and 106 with high rigidity. The suspension brackets 156, 158 overlap at least the rear ends 160, 162 of the box members 116, 118 when viewed from the side (see FIG. 6).

  Further, a mounting bracket 166 is attached to a side wall 164 on the inner side in the vehicle width direction of the side frame 106. The mounting bracket 166 is a bracket on which a drive system component (for example, a differential gear) (not shown) is mounted, and is fixed to the side frame 106 with high rigidity. The mounting bracket 166 overlaps the box member 118 as viewed from the side as shown. The drive system components are disposed by using, in addition to the mounting bracket 166, another mounting bracket 168 obliquely provided between the cross member 108e and the side frame 106.

  Hereinafter, with reference to FIG. 4 and FIG. 6, the configuration of the inside of the side frame 104, the inside of the box member 116 and the periphery thereof will be mainly described. However, the inside of the side frame 106, the inside of the box member 118, and the periphery thereof have similar configurations and functions.

  As shown in FIG. 4A, the box member 116 straddles the inflection portion 134 having a convex shape on the outer side in the vehicle width direction, which is the boundary between the diverging portion 126 of the side frame 104 and the parallel portion 130. It is arrange | positioned at the side wall 120 of the vehicle width direction outer side of this. The box member 116 protrudes outward in the vehicle width direction from the side wall 120 of the side frame 104.

  The side frame 104 has an outer member 170 located on the vehicle outer side and forming a side wall 120, and an inner member 172 located on the vehicle inner side, and these members are joined to form a rectangular closed cross section 124 (FIG. 5). Reference).

  FIG. 4B illustrates the inside of the side frame 104 by omitting the outer member 170, the inner member 172, the box member 116, and the like of the side frame 104 of FIG. 4A.

  Inside the side frame 104, as shown in FIG. 4B, an upper member 174, a lower member 176 and a bulkhead 178 are disposed. The upper member 174 and the lower member 176 are disposed on the inner member 172 from the diverging portion 126 of the side frame 104 to the parallel portion 130 via the inflection portion 134 (see FIG. 5). The lower member 176 is disposed apart from the upper member 174.

  Furthermore, as shown in FIG. 5, the upper member 174 and the lower member 176 are disposed at the upper corner 180 and the lower corner 182 of the inner member 172, and together with the upper corner 180 and the lower corner 182 Each is formed. In this manner, the upper and lower members 174 and 176 reinforce the side frame 104 from its interior.

  The bulkhead 178 is disposed inside the inflection portion 134 of the side frame 104 as shown in FIG. 4B, and reinforces the inflection portion 134 from the inside. The bulkhead 178 has a plate-like body portion 184 and a plurality of flanges 185 a-185 d extending from the body portion 184. The main body portion 184 faces the rectangular closed cross section 124 of the side frame 104.

  The flanges 185a to 185d extend toward the upper side, the lower side, the outer side, and the inner side of the vehicle inside the inflection portion 134 of the side frame 104 to form the inflection portion 134, as shown in FIG. 4B. The outer member 170 and the inner member 172 are joined to each other. In this way, the bulkhead 178 is securely bonded to the inside of the inflection portion 134.

  6 is a view showing a cross section taken along the line C-C of the vehicle body structure of FIG. In the drawing, in addition to the inside of the box member 116, each member disposed on the inner side in the vehicle width direction than the box member 116 is schematically shown by a dashed line.

  The box member 116 includes an upper wall 186, a lower wall 187, and a reinforcing member 188 connecting the upper wall 186 and the lower wall 187, as shown in FIG. Structure is high. The upper wall 186 is formed with a pair of first beads 190 a and 190 b. The first beads 190a and 190b extend in the vehicle width direction and are separated from each other in the vehicle longitudinal direction (see FIG. 4A). The lower wall 187 is formed with a pair of second beads 192 a and 192 b. The second beads 192a and 192b extend in the vehicle width direction and are spaced apart in the vehicle longitudinal direction (see FIG. 3). Further, as shown in FIG. 6, the first beads 190a, 190b and the second beads 192a, 192b have equal positions in the longitudinal direction of the vehicle.

  The reinforcing member 188 includes a pair of vertical walls 194a and 194b, a pair of top walls 196a and 196b, a pair of inclined walls 198a and 198b, and a bottom wall 199. The vertical walls 194 a and 194 b are spaced apart in the longitudinal direction of the vehicle and connect the upper wall 186 and the lower wall 187. The top walls 196a, 196b extend from the pair of vertical walls 194a, 194b along the upper wall 186 so as to approach each other. The sloped walls 198 a and 198 b extend obliquely downward from the pair of ceiling walls 196 a and 196 b so as to approach each other and reach the lower wall 187. The bottom wall 199 connects the pair of inclined walls 198 a and 198 b along the lower wall 187. Thus, the reinforcing member 188 has a pair of vertical walls 194a and 194b, a pair of top walls 196a and 196b, a pair of inclined walls 198a and 198b, and a bottom wall 199, so that the reinforcing member 188 is substantially M-shaped as viewed from the side. It is a continuous member in the shape of a circle.

  The first beads 190a, 190b and the second beads 192a, 192b are located within the range of the inclined walls 198a, 198b in the vehicle longitudinal direction, as shown. Furthermore, the second beads 192a and 192b are located outside the range of the bottom wall 199 in the front-rear direction of the vehicle. In addition, the main body portion 184 of the bulkhead 178 is located within the range of the inclined wall 198a in the front-rear direction of the vehicle. Further, the body portion 184, the first bead 190a and the second bead 192a of the bulkhead 178 have the same position in the longitudinal direction of the vehicle.

  The bracket 142a corresponding to the mounting position of the cross member 108e to the side frame 104 is positioned within the range of the inclined wall 198a in the longitudinal direction of the vehicle in the longitudinal direction of the vehicle. Furthermore, the suspension bracket 156 is located within the range of the inclined wall 198b in the vehicle longitudinal direction.

  Here, at the time of a side collision, particularly, as shown in FIG. 2, a case where the pole 138 collides with the side sill 110 from diagonally on the outer side in the vehicle width direction and a load is input to the box member 116 will be described. The input load (see arrow D) input to the box member 116 is transmitted to the inflexible portion 134 of the side frame 104 that supports the box member 116 at the inner side in the vehicle width direction.

  Part of the load transmitted to the inflection portion 134 of the side frame 104 is dispersed to the cross member 108 e via the bracket 142 a overlapping at least the front end portion 152 of the box member 116, and is inclined toward the central portion in the vehicle width direction. It is transmitted forward (see arrow E). The load transmitted to the central portion in the vehicle width direction of the cross member 108 e is transmitted to the cross member 108 d extending diagonally forward through the joining member 150 (see arrow F). The load transmitted to the cross member 108 d is dispersed to the side frame 106 via the bracket 140 b located on the vehicle front side of the inflection portion 136 of the side frame 106. As indicated by an arrow G in the drawing, the load transmitted to the inflection portion 134 of the side frame 104 is dispersed to the side frame 106 through not only the cross members 108 d and 108 e but also the cross member 108 f.

  In the vehicle body structure 100 according to the present embodiment, the box members 116, 118 are disposed on the side walls 120, 122 across the rigid rigid inflection portions 134, 136 of the side frames 104, 106. It protrudes outward in the width direction. For this reason, the box members 116 and 118 are supported by the rigid inflexion portions 134 and 136 of the side frames 104 and 106 when receiving a load at the side collision. Furthermore, the box members 116 and 118 are a highly rigid structure that is not easily crushed even when receiving a load at the side collision. Therefore, according to the vehicle body structure 100, the side frames 104 and 106 are less likely to be deformed inward in the vehicle width direction even if a side collision occurs, and the box members 116 and 118 move inward in the vehicle width direction at side collision. Can be prevented. Therefore, in a vehicle of a type in which the cabin 102 is disposed above the vehicle body structure 100, deformation of the cabin 102 due to a side collision can be suppressed.

  Further, in the vehicle body structure 100, as shown in FIG. 6, the suspension brackets 156, 158 are disposed so as to overlap the rear end portions 160, 162 of the box members 116, 118 when viewed from the side. Therefore, at the side collision shown in FIG. 3, the suspension bracket 156 is positioned in the direction (the direction of the arrow D) in which the box member 116 receives a load. Therefore, according to the vehicle body structure 100, since the suspension brackets 156 and 158 serve as a back shield at the time of a side collision and support the box members 116 and 118, the rigidity of the side frames 104 and 106 can be further enhanced.

  Further, in the vehicle body structure 100, the brackets 142a and 142b of the cross member 108e are arranged to overlap the front end portions 152 and 154 of the box members 116 and 118 when viewed from the side. Therefore, at the time of a side collision, the brackets 142a and 142b can serve as a back shield to support the box members 116 and 118.

  As shown in FIG. 2, in the vehicle body structure 100, the cross members 108d and 108e are formed in an X shape in plan view. Therefore, the load received by the box member 116 can be transmitted to the cross member 108 e extending diagonally forward through the bracket 142 a and can be further transmitted to the cross member 108 d extending diagonally forward and dispersed. Therefore, according to the vehicle body structure 100, the rigidity of the side frames 104 and 106 can be further enhanced.

  As shown in FIG. 6, in the vehicle body structure 100, the mounting bracket 166 attached to the side wall 164 on the inner side in the vehicle width direction of the side frame 106 is arranged to overlap the box member 118 when viewed from the side. Therefore, in the vehicle body structure 100, the mount bracket 164 having high rigidity can serve as a back shield at the side collision to support the box member 118, and the rigidity of the side frame 106 can be further enhanced.

  Furthermore, in the vehicle body structure 100, bulkheads 178, which reinforce the side frames 104, 106 from the inside, are arranged to overlap the box members 116, 118 when viewed from the side. For this reason, according to the vehicle body structure 100, it is possible to suppress the deformation of the side frames 104 and 106 themselves serving as back shields of the box members 116 and 118 at the time of a side collision, and to further enhance the rigidity.

  As shown in FIG. 6, in the vehicle body structure 100 according to the present embodiment, the box member 116 includes an upper wall 186, a lower wall 187, and an M-shaped reinforcing member 188, which form a box shape. Can increase the rigidity. Therefore, the box member 116 can maintain the box shape against the load even when receiving a load at the side collision.

  In the box member 116, the pair of first beads 190a and 190b of the upper wall 186 and the pair of second beads 192a and 192b of the lower wall 187 are located within the range of the pair of inclined walls 198a and 198b in the vehicle longitudinal direction. There is. Therefore, in the box member 116, the rigidity in the range in the vehicle longitudinal direction of the pair of inclined walls 198a and 198b of the upper wall 186 and in the range in the vehicle longitudinal direction of the pair of inclined walls 198a and 198b of the lower wall 187 are enhanced. be able to.

  Further, as shown in FIG. 6, in the box member 116, the pair of second beads 192 a and 192 b of the lower wall 187 is located outside the range of the bottom wall 199 in the vehicle longitudinal direction. Therefore, in the box member 116, the rigidity of the lower wall 187 outside the range in the vehicle longitudinal direction of the bottom wall 199 can be enhanced.

  In this manner, the box member 116 can maintain the box shape against the load even when the box member 116 receives a load that causes the upper wall 186 and the lower wall 187 to approach and squeeze during side collision. Therefore, according to the vehicle body structure 100, the rigidity of the box members 116, 118 disposed on the side walls 120, 122 of the side frames 104, 106 can be enhanced to suppress the deformation of the box members 116, 118 at the side collision.

  In the vehicle body structure 100, the bulkhead 178 is disposed within the range of the inclined wall 198a in the longitudinal direction of the vehicle. For this reason, the side frames 104 and 106 serving as the back shields of the box members 116 and 118 at the time of a side collision diagonally between the upper wall 186 and the lower wall 187 of the reinforcing member 188 around the bulkhead 178. Can support the inclined wall 198a passed to the That is, the side frames 104 and 106 can fully support the box members 116 and 118 including the upper wall 186 and the lower wall 187 in addition to the reinforcing member 188 back and forth.

  Therefore, according to the vehicle body structure 100, the rigidity of the box members 116 and 118 disposed on the side walls 120 and 122 of the side frames 104 and 106 can be enhanced to suppress the deformation of the box members 116 and 118 at the side collision. Furthermore, in the vehicle body structure 100, deformation of the side frames 104 and 106 themselves serving as a back shield of the box member at the time of a side collision can be suppressed, and the box members 116 and 118 can be reliably supported.

  Further, in the box member 116, a pair of first beads 190a and 190b are formed on the upper wall 186, and second beads 192a and 192b are formed on the lower wall 187. Therefore, in the box member 116, the rigidity of the upper wall 186 is enhanced by the first beads 190a and 190b, and the rigidity of the lower wall 187 is enhanced by the second beads 192a and 192b.

  Further, in the box member 116, the positions of the bulkhead 178, the first beads 190a and 190b, and the second beads 192a and 192b in the vehicle longitudinal direction are equal to one another. Therefore, in the vehicle body structure 100, the side frames 104 and 106 can reliably support the bulkhead 178 at the upper wall 186, the lower wall 187, and the reinforcing member 188 of the box members 116 and 118 with increased rigidity. .

  Further, in the vehicle body structure 100, since the positions of the brackets 142a and 142b in the vehicle longitudinal direction are positioned within the range of the vehicle longitudinal direction of the inclined wall 198a, the cross member 108e serves as a back shield at the time of a side collision and the box member 116 , 118 can be supported. Therefore, in the vehicle body structure 100, the box members 116 and 118 can be reliably supported by the cross members 108e in addition to the side frames 104 and 106 at the side collision. Further, in the vehicle body structure 100, the side frames 104 and 106 serving as the back shields of the box members 116 and 118 are supported by the cross member 108e, so that deformation of the side frames 104 and 106 at the side collision can be suppressed more reliably.

  Further, in the vehicle body structure 100, the suspension brackets 156, 158 are positioned within the range of the inclined walls 198a, 198b of the box members 116, 118 in the vehicle longitudinal direction. For this reason, in the vehicle body structure 100, the side frames 104 and 106 serving as back shields of the box members 116 and 118 at the time of side collision are supported by the suspension brackets 156 and 158, thereby deforming the side frames 104 and 106 at the time of side collision. It can be suppressed. Furthermore, in the vehicle body structure 100, the box members 116 and 118 can be reliably supported by the side frames 104 and 106 as well as the suspension brackets 156 and 158.

  In the above embodiment, as shown in FIG. 6, the reinforcing member 188 further has a pair of top walls 196a, 196b and a bottom wall 199 in addition to the pair of vertical walls 194a, 194b and the pair of inclined walls 198a, 198b. So, when viewed from the side, it is an almost M-shaped continuous member. However, if reinforcing member 188 can connect upper and lower walls 186 and 187 of box members 116 and 118 to increase the rigidity of box members 116 and 118, pair of ceiling walls 196a and 196b and the bottom The configuration without the wall 199 may be employed.

  As an example, the reinforcing member 188 may have a pair of vertical walls 194a, 194b and a pair of sloped walls 198a, 198b that are inclined between the pair of vertical walls 194a, 194b. In this case, the pair of vertical walls 194a and 194b and the pair of inclined walls 198a and 198b may be joined to each other by the upper wall 186, and the pair of inclined walls 198a and 198b may be joined to each other by the lower wall 187. In this way, when viewed from the side, the reinforcing member 188 is an M-shaped member in which the pair of vertical walls 194a and 194b and the pair of inclined walls 198a and 198b are continuous.

  As another example, the pair of vertical walls 194a and 194b and the pair of inclined walls 198a and 198b are respectively joined to the upper wall 186 in a state of being separated from each other, and the pair of inclined walls 198a and 198b are also separated from each other May be joined to the lower wall 187 respectively. In this case, the pair of vertical walls 194a and 194b and the pair of sloped walls 198a and 198b are not joined to each other, and the pair of sloped walls 198a and 198b are also not joined to each other. In this way, the reinforcing member 188 comprises four non-continuous members, ie, a pair of vertical walls 194a and 194b and a pair of inclined walls 198a and 198b, and as viewed from the side, the result is substantially M-shaped Will be

  Each of these reinforcing members 188 can connect the upper wall 186 and the lower wall 187 of the box members 116, 118 with the pair of vertical walls 194a, 194b and the pair of inclined walls 198a, 198b. The rigidity of 116, 118 can be increased. Thus, the box members 116 and 118 can maintain the box shape against the load even when receiving a load at the side collision.

  Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the appended claims, and of course these also fall within the technical scope of the present invention. It is understood.

  The present invention can be used for a vehicle body structure.

DESCRIPTION OF SYMBOLS 100 ... Body structure, 102 ... Cabin, 104, 106 ... Side frame, 108a-108i ... Cross member, 110, 112 ... Side sill, 114 ... Floor panel, 116, 118 ... Box member, 120, 122, 164 ... Side frame Side wall 124: closed cross section 126, 128: flared portion 130, 132: parallel portion 134, 136: inflection portion 138: pole, 140a, 140b, 142a, 142b ... bracket, 144a, 144b, 146a, 146b 148a, 148b: each side of the bracket, 150: joining member, 152, 154: front end of the box member 156, 158: suspension bracket, 160, 162: rear end of the box member, 166, 168: mounting bracket, 170 ... outer member, 172 ... inner member, 174 Upper member 176: lower member 178: bulkhead 180: upper corner of inner member 182: lower corner of inner member 184: body of bulkhead 185a to 185d: flange of bulkhead 186: upper wall of box member, 187: lower wall of box member, 188: reinforcing member of box member, 190a, 190b: first bead, 192a, 192b, second bead, 194a, 194b, vertical wall, 196a, 196b ... sky wall, 198a, 198b ... inclined wall, 199 ... bottom wall

Claims (5)

In a vehicle body structure including a pair of side frames which are members extending in the longitudinal direction of the vehicle and spaced apart in the vehicle width direction, the vehicle body structure further includes:
A box member disposed on an outer side wall width direction side wall of each of the pair of side frames and protruding outward from the side wall width direction;
The box member includes an upper wall, a lower wall, and a reinforcing member connecting the upper wall and the lower wall.
The upper wall has a pair of first beads extending in the vehicle width direction and spaced apart in the vehicle longitudinal direction,
The lower wall has a pair of second beads extending in the vehicle width direction and spaced apart in the vehicle longitudinal direction,
The reinforcing member is
A pair of vertical walls spaced apart in the vehicle longitudinal direction and connecting the upper wall and the lower wall;
It has a pair of sloped walls which incline so as to descend while approaching each other between the pair of vertical walls, and which extend from the upper wall to the lower wall.
A vehicle body structure, wherein the pair of first beads and the pair of second beads are located within a range in the vehicle longitudinal direction of the pair of inclined walls. In a vehicle body structure including a pair of side frames which are members extending in the longitudinal direction of the vehicle and spaced apart in the vehicle width direction, the vehicle body structure further includes:
Box members disposed on side walls of the pair of side frames on the outer side in the vehicle width direction and projecting outward from the side walls in the vehicle width direction;
And a bulkhead for reinforcing each of the pair of side frames from the inside thereof;
The box member includes an upper wall, a lower wall, and a reinforcing member connecting the upper wall and the lower wall.
The reinforcing member is
A pair of vertical walls spaced apart in the vehicle longitudinal direction and connecting the upper wall and the lower wall;
It has a pair of sloped walls which incline so as to descend while approaching each other between the pair of vertical walls, and which extend from the upper wall to the lower wall.
The said bulkhead is located in the range of the vehicle front-back direction of the inclination wall of any one of said pair of inclination walls, The vehicle body structure characterized by the above-mentioned. The upper wall has a first bead extending in the vehicle width direction,
The lower wall has a second bead extending in the vehicle width direction,
The vehicle body structure according to claim 2, wherein positions of the bulkhead, the first bead and the second bead in the vehicle longitudinal direction are equal to one another. The body structure further comprises a cross member passed between the pair of side frames,
The position in the vehicle longitudinal direction of the attachment point of the cross member to the side frame is located within the range in the vehicle longitudinal direction of any one of the inclined walls of the pair of inclined walls of the box member. The vehicle body structure according to claim 1 or 2. The body structure further comprises a suspension bracket disposed below each of the pair of side frames,
3. The vehicle body structure according to claim 1, wherein the suspension bracket is positioned within a range in the vehicle longitudinal direction of one of the inclined walls of the pair of inclined walls of the box member.

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